All categories

2 years ago

There are 35 competitors in a marathon. Sixty percent of these finished the race in under four hrs. How many did not?

Mathematics

1 answer:

Nikitich [7]2 years ago

7 0

Answer:

14 did not finish under 4 hours.

Step-by-step explanation:

Givens

Total number of competitors = 35

% who finish under 4 hours = 60%

Formula

Those who did not = 35 - 60%*35

Solution

Those who did finish under 4 hours = 35 * 60%

Those who did finish under 4 hours = 35*60/100 = 2100/100

Those who did finish under 4 hours = 21

Those who did not = 35 - 35*60/100

Those who did not = 35 - 21

Those who did not = 14

====================

There is another way to do this. Realize that 40% did not finish the race in under 4 hours.

Those who did not finish in under 4 hours = 35*40/100 = 1400 / 100 = 14

You might be interested in

A big cruise ship dropped anchor off the caribbean island of Antigua. The heavy anchor dropped into the water at a rate of 2.5 m

hjlf

Ok what’s next? Did you give us the answer?

7 0

2 years ago

Read 2 more answers

brandy took 3 friends out for dinner. the cost of the meals was 46.50 . she left a 20% tip. what was the total cost including th

Vedmedyk [2.9K]

Answer:

The total cost of the meal including tip is $55.80.

Step-by-step explanation:

Cost of the meal = $46.50

tip = 20%

total cost = ?

Finding the tip cost:

20% of cost of the meal is equal to the tip cost.

20% of 46.50

(% = 1/100 and of means multiplication)

20/100 * 46.50

930/100

$9.30

20% tip = $9.30

Finding total cost:

Cost of the meal + tip

46.50 + 9.30

55.80

The total cost of the meal including tip is $55.80.

7 0

2 years ago

How many different outcomes can happen from spinning a four-section spinner twice, according to the diagram given?

ivanzaharov [21]

8 different outcomes

4 0

2 years ago

Victonia counts this week's food donations at a pet shelter. There are 16 full cases of canned food. There are 4 cases of canned

MrRissso [65]

Answer:

We know that C is the total number of cans in a complete case.

Victoria counts:

16 full cases, so in those we have: 16*C cans.

4 cases with 5 missing cans, so in those we have:

Then if each case has C cans, the cases that are missing 5 cans have:

C - 5 cans.

Then in those four cases we have a total of: 4*(C - 5) cans.

And Victoria knows that there are 220 cans, then we have that:

16*C + 4*(C - 5) = 220

16*C + 4*C - 20 = 220

16*C + 4*C = 220 + 20 = 240

20*C = 240

C = 240/20 = 12

Then each case has 12 cans.

Then the number of cans in the cases with missing cans is:

12 cans - 5 cans = 7 cans.

Step-by-step explanation:

Hope this helps!!!!!!!! :D

4 0

1 year ago

Kadeem rode his bike at a constant speed. He rode 1 mile in 5 minutes. Which equation represents the amount of time in minutes,

sashaice [31]

Answer:

Step-by-step explanation:

Speed is the rate of change of distance over time.

The equation represents the amount of time t is \mathbf{t = 5 d}t=5d

Speed is calculated using:

\mathbf{Speed = \frac{distance}{time}}Speed=timedistance

When distance = 1 mile, and time = 5 minutes.

We have:

\mathbf{Speed = \frac{1}{5}}Speed=51

When distance = d, and time = t

We have:

\mathbf{Speed = \frac{d}{t}}Speed=td

Substitute \mathbf{Speed = \frac{1}{5}}Speed=51

\mathbf{\frac{d}{t} = \frac 15}td=51

Cross multiply

\mathbf{t = 5 \times d}t=5×d

\mathbf{t = 5 d}t=5d

Hence, the equation represents the amount of time t is \mathbf{t = 5 d}t=5d

5 0

1 year ago

Read 2 more answers